Cysteine Protease-Mediated Autocleavage of

Here, we investigated toxin domain functions that regulate the proinflammatory activity ofBlocking autoprocessing of TcdB by mutagenesis or chemical inhibition, while reducing cytotoxicity of the toxin, significantly enhanced its proinflammatory activities in the animal model. Furthermore, a noncleavable mutant TcdB was significantly more potent than the wild-type toxin in the induction of proinflammatory cytokines in human colonic tissues and immune cells.In this study, we identified a novel mechanism of regulating the biological activities of